Method of casting.



H. HESS.

- METHOD 0.15 CASTING.

APPLICATION FILED JUNB18,1913.

Patented Mar. 16, 1915.

l W Adwaf, 1, no."

METHOD OF C. STIIJ'G.

memes.

Specification of Letters Patent.

Application filed. June 18, 1913. Serial lilo.

. delphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful improvements in Methods of Casting, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to the production of cast objects such as ingots and the like, the object of the invention being to produce castings which-will be sound and tree from pipes, shrinkage cavities, a like defects so common with ingots nsor produced; and the invention consists of an improved method of casting, in which the body of moltennnetal to form'the casting or ingot, is subjected to a rotary motion, and during its rotation, additional molten metal is supplied to the body in such manner-as to prevent the formation of shrinkage cavities and like defects in the solidifying metal, and produce a sound casting solid throughout.

In the accompanying drawings I have represented, by Way of example, a form of apparatus suitable for carrying my iuiproved method into efiect, but it will be manifest that other forms of apparatus may be employed for this purpose, the present invention residing in the method of procedure Without regard to the particular form of apparatus employed. Further it Will be understood that my invention is not limited to any particular mode or manner of treatment or manipulation of the molten metal, or sequence of steps in its treatment, except in so far as such limitations are specified in the claims.

In theaccompanying drawings: Figure l is a vertical sectional elevation of a casting apparatus suitable for carrying my method into efi'ect.

elevations of the upper end of the mold 2 containing a central pouring spout 3.-

arily Figs. 2, 3 and 4 are sectional rotate the same' This mold is supported fixedly on a rotary table or support so as to he rotatable with it, and. the table is fixed to the upper end of a spindle 5 mounted in hearings in a frame 6, and rotated by intermeshing bevel gears 7 and 8 on the spindle and on the horizontal shaft 9 respectively. The shaft is provided with. a driving pulley 10 adapted to be driven from any suitable source of power.

in the use of the apparatus in casting an ingot for instance, in accordance with my invention, the molten metal is poured into the spout 3 of the mold cover and the mold is rapidly rotated by the driving" mechanism described. The metal partially filling the mold, Will be caused by centrifugal force to rise at its sides inthe mold as at 11. 2, thereby forminga central hollow or spar/e12 extending some distance down into the body of metal. The pouring of the metal through the spout losing continued, the added metal will flow into the. central hollow and ill further displace the metal in the mold, causing its'outer sides to rise i still higher with the result that as the iilL ing proceeds the rising metal will come into contact with the mold cover and will be caused by the latter to How inwardly and be turned over on itseli into the central space as shown in 3. As the solidification of the molten mass proceeds from the bottom upwardly, and from the sides inwardly, the central space will become gradually filled from the top supply being poured in, until the mold space is completely occupied by the metal as shown in Fig. l. The supply of metal may be continued until it hacks up in the fpouring spout as at 13, thus producing' a ceding head which will act to maintain the mold completely filled during the final stage of solidification, and Will prevent the iormation shrinkage cavities.

a result of the foregoing operation a sound casting will he produced which will be solid throughout its longitudinal and transverse extent and which will be entirely free from i es shrinka e cavities and like defects.

Having thus described my invention what I the outer sides of the mold and rise therein and thereby form a hollow in the body of the metal, supplying molten metal to the ii U mold and into said hollow to cause the displaced metal to tlow inwardly into the hollow, and continuing the supply until the mold is completely filled.

2. The method of casting ingots, which consists in rotating a mold containing molten metal to cause the same to flow to the outer sides of the mold and rise therein and thereby form a hollow in the center of the ludy, supplying molten metal to said hollounto cause the displaced metal to rise still higher at the sides, oll'ering an obstruction to the further rise of the metal to cause the same to he turned inwardly and flow into said hollow, and continuing the supply of metal until the mold is completely tilled.

3. 'lhe method of casting, which consists in rotating a partially filled mold of molten material, supplying additional molten material to the mold during its rotation, continuing the supply of material until the mold is completely filled and maintaining a h zad of the molten material after the moldis filled, and during solidification of the metal in the mold.

4. The method of casting, which consists in rotating a covered, partially filled mold of molten material introducing additional molten material through the cover of the mold during its rotation, and continuing the supply of metal to the mold to cause the metal therein to flow against the cover and be deflected thereby toward the center in the body of metal.

5. The method of casting, which consists in rotating a body of molten material about an upright axis situated within the body to cause its sides to rise and form a central hollow, and supplying additional molten material to the central hollow, While causing the rising sides of the body to be turned over onto itself into said hollow, and continuing the supply of metal until the mold is completely filled.

In testimony whereof I have afiixed my signature in presence of two witnesses.

- HENRY HESS.

Witnesses ABRAHAM FELT, \V. R. KENNEDY. 

